davis, tonyn and sarah, back to you. >>> since security has heightened in a number of locations in a number of citiesi across the u.s. as a precautionc that includes the nation's natis capital. >> the city's emancipation day y parade will go on as scheduled.. melanie alnwick is live at freedom plaza with more on the e extra police presence, good pres morning melanie. >> reporter: good morning, tony and sarah, yes. freedom plaza right behind me is where the parade is going togoio wrap up, and there will be al ba street festival following the te parade. and yes, there's additional addi security here. a little wider perimeter, peri perhaps than they would have hae ordinarily had.had. notice that both security ask on display across the area from areas of the national airportnal all the way to the white house. the u.s. secret service has expanded its perimeter aroundmer the grounds of the white housete but we're told not because of any specific intelligence. inte and pennsylvania avenue sealeded off, that area where people pe would normally gather to take photographs, extra personnel pes